Folding stereoscope.



A. M AERZ.

FOLDING STBRBOSCOPE. APPLICATION FILED NOV.18, i913.

Patented May 19, 1914.

INVENTORA ATTORNEY WITNESSES UNITED STATES PATENT OFFICE.

ALOYS MAERZOF RIDGEWOOD, NEW JERSEY, ASSIGNOR TO ALFRED G. STUMPF, 0F

' PATERSON, NEW JERSEY.

ronnmo s rnnnesooien.

Patented May 19, 1914.

Serial No. 801.580.'

This invention relates to folding stereoscopes of the kind illustrated in the patent to Fritz Berger, No. 10 24613, and it consists in certain improvements in the same having for their principal objects to avoid the shadows that fall on the picture when the picture-support is constructed and arranged as set forth in that patent and to provide for adjustment of said support in focusing the picture to suit the eye of the observer.

The invention will be found fully illustrated in the accompanying drawing, wherein,

Figure 1 is a perspective view of the improved folding stereoscope; Fig. 2 shows the same laid out flat; and, Fig. 3 shows the device folded.

The hinged parts a, b, c and d; the lenses e in the part b," the slotted ears f on the parts (Z and slots 9 in part a, together with the hooks h on said part a, and the disks 2' on part b for covering thelenses are or ma be all substantially the same as in the a oresaid Berger patent, it being understood that my invention is applicable to any folding stereoscope formed of sheet material having the box-like shield A and the extension B, respectively affording the sight openings and a means to carry the picture-support.

The support for the picture (0) may be thus described: j, is an elongated iece of sheet material formed with a longitudinal slot in and disposed upon the extension B. ][t is movable on said extension longitudinally of itself and toward and from the shield A, being guided in its movement by the rivet Z and the pivoted clip m which, when the apparatus is folded into the form shown in Fig. 3, enters an elongated opening it in the part c and may then be turned a to maintain the folded condition.

Secured to the relatively outerend of the piece j, as by the rivet p, is a foldable piece thereof, the same having each end bifurcated or split, as shown, and the members r formed by the splits provided with ears 8 and slots t. Each of said members is folded back upon the intermediate portion of the piece 9 and is interlocked with the corresponding or opposite member by engaging the ear 8 of the one in the slot t of the other, so that the four members then afford a slit u in which the picture C may be held. When the apparatus is folded, as in Fig. 3, said members are disengaged from each other and laid out flat on the extension.

By this construction the picture support does not obstruct the light, because there is ample space between it and the shield A to admit the light to the picture, and the picture may be adjusted toward and from the shield so as to focus the same to suit the eyes of the observer.

Having thus fully described my invention, What I claim as new and desire to secure by Letters Patent is 1. A folding stereoscope formed of sheet material and including, with a box-like shield-portion having vision openings in one side and being open at the other side and an extension projecting horizontally from said other side, a picture-support also formed of sheet material and carried by said extension and having upstanding picture-supporting portions spaced from said shield-portion and adapted to be folded fiatwise against a part of the stereoscope when the latter is folded, said picture-supporting portions having means to interlock them together in the upstanding position.

2. A folding stereoscope formed of sheet material and including, with a box-like shield-portion having vision openings in one side and being open at the other side and an extension projecting horizontally from said other side, a picture-support also formed of sheet material and carried by said extension and having upstanding picture-supporting portions spaced from said shield-portion and adapted to be folded flatwise against a part of the stereoscope when the latter is folded, said support being adjustable on the extension to an from the shield-portion. 3. A folding stereoscope formed of sheet material and including, with a box-like shield-portion having vision openings in one tions adapted to be folded fiat-wise against side and being open at the other side and an said extension. 10 extension projecting horizontally from said In testimon whereof I aflix my signature other side, a picture-support also formed of in presence 0 two witnesses.

sheet material and including a body-portion ALOYS MAERZ. arranged flatwise and adjustable on the ex- Witnesses: tension toward and from said shield-por- JOHN W. STEWARD,

tion and upstanding picture-supporting por- WM. D. BELL. 

